(i)[2]
Find the value of $V$.
(ii)[1]
Find the speed with which $Q$ arrives at the ground.
(iii)[2]
Find the height of $Q$ above the ground when $t = 0$.
Mathematics 9709 · AS & A Level · Kinematics of motion in a straight line
Kinematics of motion in a straight line — practice question
Particles $P$ and $Q$ travel vertically while gravity acts on them. The graphs give the upward velocity $v\,\text{m s}^{-1}$ against time $t$ s for $0 \leq t \leq 4$. $P$ is projected with velocity $V\,\text{m s}^{-1}$, whereas $Q$ begins from rest.